Re-reading your post it sounds like you are FI and there is no reason for your husband to keep working if he doesn’t want to. Do you have an idea of what your lives would look like if work was an obligatory part of your lives? Maybe have that conversation with your husband and see what comes of it.
This.
You have just come through a big change in your life, and a number of things you say sound like you are planning for another big one, once your kids graduate. Particularly coming from the structured life of the military, I would challenge yourselves to paint a picture of what kind of life you are going to, rather than just what you are leaving. If that's a blank canvas, it may not be happy. (at least, in the long run) Also, while your cash flow is great, you don't yet have a lot large lump sum for emergencies. Given all this, I wouldn't be in a hurry. Rather, take the time to work to the target you already stated: when the kids move out. You will have a great cushion by then, and you can take some steps toward whatever's next: travel to some places you think you might move (if it's not just the house, but the city) Maybe get a vacation home that could become the next home. Start a side gig or get involved in social groups that you might like to ramp up "after." If you start to get a good enough picture that you feel anxious to get there, then you can look to pull your timetable forward.
And, get that savings into investments! 1.8% is losing money, after inflation. With a horizon as long as yours, you need to win that battle.